<template>
  <div class="star" :class="'star-'+size">
    <span class="star-item" v-for="(sc, index) in starClass" :class="sc" :key="index"></span>
  </div>
</template>

<script>
  const CLASS_ON = 'on';
  const CLASS_HALF = 'half';
  const CLASS_OFF = 'off';
  export default {
    props: {
      score: Number,
      size: Number
    },
    computed: {
      starClass() {
        const {score} = this;
        const scs = [];
        const scoreInteger = Math.floor(score);
        for (let i =0; i<scoreInteger;i++){
          scs.push(CLASS_ON);
        }
        if(score*10 - scoreInteger*10 >= 5){
          scs.push(CLASS_HALF);
        }
        while(scs.length <5){
          scs.push(CLASS_OFF)
        }


        return scs;
      }
    },
    name: "Star"
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixins.styl";

  .star //2x图 3x图
    float left
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px
        &:last-child
          margin-right: 0
        &.on
          bg-image('./images/star48_on')
        &.half
          bg-image('./images/star48_half')
        &.off
          bg-image('./images/star48_off')
    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/star36_on')
        &.half
          bg-image('./images/star36_half')
        &.off
          bg-image('./images/star36_off')
    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/star24_on')
        &.half
          bg-image('./images/star24_half')
        &.off
          bg-image('./images/star24_off')
</style>
